added content navigation abstract class & compiler pass
fixed issue at contentnavigation
Merge branch 'develop' of github.com:massiveart/SuluAdminBundle into feature/content-navigation
fixed merge conflicts
added test for contentnavigation
renamed test class
reviewed pull request
Merge branch 'feature/content-navigation' into develop

Conflicts:
	Resources/public/js/vendor/husky/husky.js
	Resources/public/js/vendor/husky/husky.min.js